JPS5785932A - Production of electric welded steel pipe having superior low temperature toughness - Google Patents

Production of electric welded steel pipe having superior low temperature toughness

Info

Publication number
JPS5785932A
JPS5785932A JP16224380A JP16224380A JPS5785932A JP S5785932 A JPS5785932 A JP S5785932A JP 16224380 A JP16224380 A JP 16224380A JP 16224380 A JP16224380 A JP 16224380A JP S5785932 A JPS5785932 A JP S5785932A
Authority
JP
Japan
Prior art keywords
toughness
low temp
steel pipe
hot rolling
welded steel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP16224380A
Other languages
Japanese (ja)
Other versions
JPS6119686B2 (en
Inventor
Hiroshi Murayama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP16224380A priority Critical patent/JPS5785932A/en
Publication of JPS5785932A publication Critical patent/JPS5785932A/en
Publication of JPS6119686B2 publication Critical patent/JPS6119686B2/ja
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

PURPOSE:To obtain an electric welded steel pipe having superior low temp. toughness without costly special elemnts and heat treatments by specifying the components, hot rolling and cooling conditions of a bland material. CONSTITUTION:Steel consisting of 0.01-0.12 C by %, 0.5-1.2 Mn, 0.10-0.25 Si, 0.001-0.030 P, <=0.010 S, 0.0010-0.0060 Ca, and the balane Fe with unavoidable impurities is completed of hot rolling at 80-840 deg.C, is cooled at 5-15 deg.C/sec in excess of 700 deg.C, is quickly cooled at >=15 deg.C/sec to below 700 deg.C and is coiled at below 570 deg.C. Here, low temp. toughness degrades with all of the C above the upper lumit, the Mn out of the range, the S above the upper limit, and the Ca below the lower limit. The hot rolling outside said range results in degraded low temp. toughness. The cooling rate in excess of 700 deg.C is the range where the low temp. toughness is improved. The coiling temp. provides good low temp. toughness as well under the above-described conditions.
JP16224380A 1980-11-18 1980-11-18 Production of electric welded steel pipe having superior low temperature toughness Granted JPS5785932A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16224380A JPS5785932A (en) 1980-11-18 1980-11-18 Production of electric welded steel pipe having superior low temperature toughness

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16224380A JPS5785932A (en) 1980-11-18 1980-11-18 Production of electric welded steel pipe having superior low temperature toughness

Publications (2)

Publication Number Publication Date
JPS5785932A true JPS5785932A (en) 1982-05-28
JPS6119686B2 JPS6119686B2 (en) 1986-05-19

Family

ID=15750701

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16224380A Granted JPS5785932A (en) 1980-11-18 1980-11-18 Production of electric welded steel pipe having superior low temperature toughness

Country Status (1)

Country Link
JP (1) JPS5785932A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS613841A (en) * 1984-06-18 1986-01-09 Nippon Steel Corp Manufacture of projected bead removing type electric welded steel pipe with superior toughness at low temperature

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS613841A (en) * 1984-06-18 1986-01-09 Nippon Steel Corp Manufacture of projected bead removing type electric welded steel pipe with superior toughness at low temperature
JPH0328487B2 (en) * 1984-06-18 1991-04-19 Nippon Steel Corp

Also Published As

Publication number Publication date
JPS6119686B2 (en) 1986-05-19

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